Convert common SI and CGS dynamic-viscosity units while keeping dynamic viscosity distinct from kinematic viscosity.
Start with a broad dimension converter or jump to the most common metric/imperial pairs. Specialist converters remain available from the full hub.
Convert Pa·s, mPa·s, centipoise, and poise. One centipoise equals one millipascal-second, and one poise equals 0.1 Pa·s.
Dynamic viscosity and kinematic viscosity are different quantities. Converting between them requires density, so this page does not mix units such as cP with cSt.
Dynamic viscosity describes resistance to shear and is commonly expressed in Pa·s, mPa·s, poise, or centipoise. Kinematic viscosity divides dynamic viscosity by density and uses area-per-time units. Converting between the two requires density at the relevant conditions; it is not a direct unit conversion. Keep the quantity type explicit before copying a value into an engineering calculation.
Many liquids change viscosity substantially with temperature. A perfectly converted value can still be inappropriate if it was measured at a different temperature from the intended process. Preserve the source temperature and material specification with the converted number when using viscosity for pump selection, lubrication, process design, or comparison between data sheets.
The converter can show many decimal places, but extra digits do not create measurement precision. Carry enough internal precision to avoid conversion-rounding drift, then report a sensible number of significant figures based on the original value. This is especially important when converting very small SI values to centipoise or other scaled units.
A useful check is to convert a known identity, such as 1 Pa·s = 1000 mPa·s = 1000 cP, before trusting a long chain of unfamiliar units. For regulated or safety-critical engineering work, compare the factor with the governing standard or approved data source. This browser tool performs arithmetic conversion; it does not validate a material certificate.
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